<template>
    <div class="home" style=" padding: 10px">
        <!--  功能区域  -->
        <div class="flex-bar">
            <!--  搜索区域  -->
            <div style="margin: 10px 0">
                <el-input v-model="search" placeholder="请输入关键字" style="width: 300px" clearable></el-input>
                <el-button type="primary" style="margin-right:20px; margin-left: 5px" @click="load">查询</el-button>
            </div>
<!--            <div style="flex-grow:1; max-width: 60%"></div>-->
            <div style="margin: 10px 0">
                <el-button type="primary" @click="add" >新增</el-button>
            </div>
        </div>
        <el-table
                :data="tableData"
                border
                stripe
                style="width: 100%">
            <el-table-column
                    prop="id"
                    label="ID"
                    sortable/>
            <el-table-column
                    prop="name"
                    label="名称"/>
            <el-table-column
                    prop="price"
                    label="单价"/>
            <el-table-column
                    prop="author"
                    label="作者"/>
            <el-table-column
                    prop="createTime"
                    label="出版时间"/>
            <el-table-column
                    prop="cover"
                    label="封面">
                <template #default="scope">
                    <el-image
                            style="width: 100px"
                            :src="scope.row.cover"
                            :preview-src-list="[scope.row.cover]">
                    </el-image>
                </template>
            </el-table-column>

            <el-table-column
                    v-if="user.role === 1"
                    label="操作">
                <template #default="scope">
                    <el-button @click="handleEdit(scope.row)" size="mini">编辑</el-button>
                    <el-popconfirm title="确认删除吗？" @confirm="handleDelete(scope.row.id)">
                        <template #reference>
                            <el-button type="danger" size="mini">删除</el-button>
                        </template>
                    </el-popconfirm>
                </template>
            </el-table-column>
        </el-table>
        <!--  分页  -->
        <div style="margin: 10px 0">
            <el-pagination
                    @size-change="handleSizeChange"
                    @current-change="handleCurrentChange"
                    :current-page="currentPage"
                    :page-sizes="[5, 10, 20]"
                    :page-size="pageSize"
                    layout="total, sizes, prev, pager, next, jumper"
                    :total="total">
            </el-pagination>

            <el-dialog
                    title="提示"
                    v-model="dialogVisible"
                    width="40%">
                <el-form :model="form" label-width="120px">
                    <el-form-item label="名称">
                        <el-input v-model="form.name" style="width: 80%;"></el-input>
                    </el-form-item>
                    <el-form-item label="单价">
                        <el-input v-model="form.price" style="width: 80%;"></el-input>
                    </el-form-item>
                    <el-form-item label="作者">
                        <el-input v-model="form.author" style="width: 80%;"></el-input>
                    </el-form-item>
                    <el-form-item label="出版时间">
                        <el-date-picker
                                value-format="YYYY-MM-DD"
                                style="width: 80%"
                                type="date"
                                clearable
                                v-model="form.createTime"></el-date-picker>
                    </el-form-item>
                    <el-form-item label="封面">
                        <el-upload ref="upload" action="http://localhost:9090/files/upload"
                                   :on-success="filesUploadSuccess">
                            <el-button type="primary">点击上传</el-button>
                        </el-upload>
                    </el-form-item>
                </el-form>
                <template #footer>
          <span class="dialog-footer">
            <el-button @click="dialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="save">确 定</el-button>
          </span>
                </template>
            </el-dialog>
        </div>
    </div>

</template>

<style>
    .flex-bar{
        display: flex;
        flex-direction: row;
        align-items: center;
    }
</style>

<script>

    import request from "../utils/request";

    export default {
        name: 'Book',
        components: {},
        data() {
            return {
                form: {},
                dialogVisible: false,
                search: '',
                currentPage: 1,
                pageSize: 10,
                total: 0,
                tableData: [],
            }
        },
        created() {
            let userStr = sessionStorage.getItem("user") || "{}";
            this.user = JSON.parse(userStr);

            //请求服务端，确认当前登录用户的合法信息
            request.get("/user/" + this.user.id).then(res => {
                if (res.code === '0') {
                    this.user = res.data;
                }
            });
            this.load();
        },
        methods: {
            filesUploadSuccess(res) {
                console.log(res);
                this.form.cover = res.data;
            },
            load() {
                request.get("/book", {
                    params: {
                        pageNum: this.currentPage,
                        pageSize: this.pageSize,
                        search: this.search
                    }
                }).then(res => {
                    console.log(res)
                    this.tableData = res.data.records;
                    this.total = res.data.total;
                })
            },
            add() {
                this.dialogVisible = true;
                this.form = {};
                if (this.$refs['upload']) {
                    this.$refs['upload'].clearFiles();  //清除历史文件列表
                }
            },
            save() {
                if (this.form.id) { //更新
                    request.put("/book", this.form).then(res => {
                        console.log(res);
                        if (res.code == '0') {
                            this.$message({
                                type: "success",
                                message: "更新成功"
                            });
                            this.load();   //刷新表格的数据
                            this.dialogVisible = false;  //关闭弹窗
                        } else {
                            this.$message({
                                type: "error",
                                message: res.msg
                            })
                        }
                    })
                } else {
                    request.post("/book", this.form).then(res => {
                        console.log(res);
                        if (res.code == '0') {
                            this.$message({
                                type: "success",
                                message: "新增成功"
                            });
                            this.load();   //刷新表格的数据
                            this.dialogVisible = false;  //关闭弹窗
                        } else {
                            this.$message({
                                type: "error",
                                message: res.msg
                            })
                        }
                    })
                }
            },
            handleEdit(row) {
                this.form = JSON.parse(JSON.stringify(row));
                this.dialogVisible = true;
                this.$nextTick(() => {
                    if (this.$refs['upload']) {
                        this.$refs['upload'].clearFiles();  //清除历史文件列表
                    }
                })
            },
            handleDelete(id) {
                console.log(id);
                request.delete("/book/" + id).then(res => {
                    if (res.code == '0') {
                        this.$message({
                            type: "success",
                            message: "删除成功"
                        });
                    } else {
                        this.$message({
                            type: "error",
                            message: res.msg
                        })
                    }
                    this.load();
                })
            },
            handleSizeChange(pageSize) {    //改变当前每页个数触发
                this.pageSize = pageSize;
                this.load();
            },
            handleCurrentChange(pageNum) {  //改变当前页码触发
                this.currentPage = pageNum;
                this.load();
            }
        }
    }
</script>